ios - 如何设置通知对象为 'UIDevice.currentDevice()'？

Question

当我为设备方向更改添加通知时，如下所示:

NSNotificationCenter.defaultCenter().addObserver(self,
        selector: Selector(layoutPages),
        name: UIDeviceOrientationDidChangeNotification as String!,
        object: UIDevice.currentDevice())

我收到错误“UIDevice is not identical to anyobject”，那么如何修复它？

Answer 1

你的第二个参数有问题，应该是字符串。此外，将 UIDevice 向上转换为 AnyObject 将有所帮助:

NSNotificationCenter.defaultCenter().addObserver(self,
    selector: Selector("layoutPages"),
        name: UIDeviceOrientationDidChangeNotification as NSString!,
      object: UIDevice.currentDevice() as AnyObject)